Re: 1981 Brougham Project

The 472 is not TBI, but I was going to try to use this setup on it. That's the only reason I want the computer to work. The coupe (that had the 472) had this computer and I trashed it. The climate control still worked without it. The 468 mod doesn't work and is unplugged anyway, I just want the car to run and the basic features to work. I have no A/C, just heat.

Re: 1981 Brougham Project

Here's a shot of the ECM opened up in case anyone was wondering what they look like. I had a closer pic, but I don't know where it got to.. there is a burnt chip in the center towards the bottom, so at least I know that a new computer isn't a waste of money. I went back to the yard today and got the alternator and the plastic/wiring for all the dash lights (since mine burned up) and put everything back to the way it should be, including removing the light bypass diode. I'm ordering a computer tonight and I guess I'll try to start it when that comes.

Re: 1981 Brougham Project

One of the internal diodes in your alternator died. Same thing happened with the alt on my 307. Still charged fine and everything, just the light stayed on

I should have took this advice all along. Got the new ECM in and new plugs and wires and it starts right up. The alternator light now works as it should and after re-timing it, it seems to run really nice. I think the next step is the exhaust, mainly because one of the manifolds is cracked and it sounds terrible. Amazing how such a small crack can give off the sense that the car is a clunker. I'm going to use my leftovers from the coupe which was straight 2 1/2 pipe to Flowmaster 40's and 2 1/4 over the rear and out the tail. Would it be more efficient to add resonators or just get quieter mufflers? I hate the way these sound, they are way too loud.

Re: 1981 Brougham Project

Check the manifold bolts. There is likely a broken one. My 81 is the same. Goes away when it gets warm. It's on the never ending to do list. Flow 40s are loud for a Caddy, but if that's the sound you like... personally, the loudest I would go is turbos with resonators. Nice tone, without the Flow "bark". Summit turbos are DIRT cheap.

Re: 1981 Brougham Project

hey angry matt

I'm looking to put the eibachs on my coupe deville as well but worried about bottoming out and potentially not getting into my driveway as its on a bit of an incline...do you find your car too low?
how high is your car off the ground? can you measure how much clearance the car has off the ground? I'm trying to gauge if I will make it up my driveway or if my bumper will just smack the pavement as I'm driving in. sorry if I'm asking for a lot but your help is appreciated.

Re: 1981 Brougham Project

I haven't been on in a while, this was becoming one of those cars that makes me not like cars and I had to take a break for a while. I put a new fuel pump in the tank and got it running again. The battery must have been bad, I thought there was a drain but it was just the battery, so far.. But the crazy check engine light and no codes were driving me nuts. The temp light comes on right at start up. Turn the key off and it doesn't come back on. No codes just goofy signals. I replaced the ECC head because the buttons hardly worked and it just didn't act right (half the time it got stuck in code mode) and I couldn't help but think this was an issue since it talks directly to the computer. It runs good now, but says I'm getting 788 mpg! Sometimes I even get 6L8 mpg. My mileage is so good they ran out of numbers to use! It's a later year ECC head, funny though.